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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Installing J 22794 Into Spark Plug Hole
    GM476770Courtesy of GENERAL MOTORS CORP.
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left  or Valve Rocker Arm Cover Replacement - Right 
  2. Remove the required valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Remove the required spark plugs. Refer to Spark Plug Replacement in Engine Controls - 4.3L.
  4. Install the J 22794  into the spark plug hole. See Special Tools .
  5. Connect a shop air supply hose and apply compressed air in order to hold the valves in place.
    6. Fig 2: Installing J 5892-D Under The Washer On The Rocker Arm Bolt
    GM476767Courtesy of GENERAL MOTORS CORP.
  6. Remove a bolt from a valve rocker arm.
  7. Install a flat washer on the bolt.
  8. Install the bolt in the valve rocker arm bolt hole for the valve spring requiring removal.
    9. CAUTION: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.
  9. Use the J 5892-D  in order to compress the valve spring. See Special Tools .
    1. Hook the slotted end of J 5892-D  under the washer on the valve rocker arm bolt. See Special Tools .
    2. Apply steady pressure on the valve spring cap until the valve keys are accessible.
    10. Fig 3: Compress The Valve Spring (Cylinder Head Installed) Using Special Tools
    GM218211Courtesy of GENERAL MOTORS CORP.
    NOTE: Completely engage the J 38606 jaws on the valve spring. The J 38606 may slip off and scratch the valve spring. Replace the valve spring if the valve spring becomes scratch.
  10. Use J 38606  when J 5892-D  will not fit. See Special Tools .
    11. Fig 4: Identifying Valve Components
    GM480555Courtesy of GENERAL MOTORS CORP.
  11. Remove the valve keys (1).
  12. Carefully release the valve spring tension.
  13. Remove the J 5892-D  or J 38606  . See Special Tools .
  14. Remove the valve spring cap (2) and valve spring (3).
  15. Remove the valve stem oil seal (4).
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